In this article, an SPR sensor based on 12-fold quasi-periodic PCF composed of Ge-doped silica is introduced for analyte detection. The outer surface of the cladding is covered by a 40 nm gold layer serving as the plasmonic layer for the proposed sensor. The birefringence induced due to the inherent characteristic of the 12-fold pattern in the cross-section provides discrepancy for the operation of the structure regarding x- and y-polarizations. The wavelength sensitivity, amplitude sensitivity, and resolution of 12150 nm.RIU⁻¹, 678 RIU⁻¹, and 8.23נ10^–6 RIU, respectively are obtained for the proposed sensor. The FEM method has been implemented to investigate the performance of the proposed sensor for biosensing application in a detection range of 1.33–1.41.

在本文中，介绍了一种基于由掺锗二氧化硅组成的 12 倍准周期 PCF 的 SPR 传感器，用于分析物检测。包层的外表面被一个 40 nm 的金层覆盖，作为所提出的传感器的等离子体层。由于横截面中 12 倍图案的固有特性而引起的双折射为关于 x 和 y 偏振的结构操作提供了差异。所提出的传感器的波长灵敏度、幅度灵敏度和分辨率分别为 12150 nm.RIU ^-1、678 RIU ^-1和 8.23נ10 ^–6 RIU。已实施 FEM 方法来研究所提出的传感器在 1.33-1.41 检测范围内的生物传感应用的性能。